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Fraxinus spp. (ash) trees are widely found in urban areas across the U.S. where they experience varying degrees and types of stress. Fertilizer and paclobutrazol (PB) are marketed as a means to alter growth and enhance tree vigor. Fertilizer typically increases radial growth but may reduce root: shoot ratios. Paclobutrazol, a gibberellin inhibitor, may reduce radial growth but increase root: shoot...
BACKGROUND: Since the discovery of Agrilus planipennis Fairmaire (emerald ash borer) in 2002, researchers have tested several methods of chemical control. Soil drench or trunk injection products containing imidacloprid are commonly used to control adults. However, efficacy can be highly variable and may be due to uneven translocation of systemic insecticides. The purpose of this study was to determine...
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